Hello!
A great feature that would enrich the RP experience is adding the ability to change the barding of a horse for cavaliers and knights. I know that various barding designs already exist in the game world, such as black and red stripes, for example.
If this feature were added, it would allow players to match their mount to the appearance of their armor. Alternatively, the colors of the barding could represent the colors of a specific faction or those of Noble Houses, particularly if there's a cavalier serving someone.
And the most amazing feature would probably be the ability to change the pattern and customize individual colors.
I hope you will consider implementing something like this.